Aim (Background): The palatal roots of the upper molars are generally selected to receive intrara... more Aim (Background): The palatal roots of the upper molars are generally selected to receive intraradicular retention posts for prosthetic purposes. The aim of this study was to evaluate the degree of transport in maxillary palatine canals prepared for intraradicular post insertion by using three different systems. Material and methods : Ninety extracted first maxillary molars were instrumented manually and obturated using the lateral condensation technique. They were then divided into three groups after the removal of gutta-percha from up to 5 mm of the working length. The canal curves were determined for each of three systems: non-instrumented canals, after instrumentation and sealed, and after gutta-percha removal. Results: The highest degree of canal transport was identified in the instrumented and obturated teeth, prior to the preparation of the canals for post insertion. No significant differences were observed in the canal transport of the three studied systems. Conclusion: Partial preparation resulted in weakening of the root structure and transport in the root canal.
Introduction: The aim of this study was to evaluate the wear of ProTaper Next rotary files, X1, X... more Introduction: The aim of this study was to evaluate the wear of ProTaper Next rotary files, X1, X2, and X3 after shaping 6, 10, and 14 maxillary molar vestibular canals. Materials and Methods: One hundred and sixty-two rotary files were divided into three groups according to the number of prepared canals, namely Group 1 (6 canals), Group 2 (10 canals), and Group 3 (14 canals). After canal preparation, files were embedded in resin molds, sectioned at 6 mm from the tip, and the wearied surface was microscopically evaluated. AutoCAD® software was used to measure the wear of edges in the different sections and multilevel mixed linear regression model to statistically analyze the data. Results: The files exhibited progressive wear as the number of uses increased. X2 and X3 files of Group 2 (10 canals) showed the highest wear, which decrease at 14 canals. Conclusions: X1, X2, and X3 files can shape until 10 canals without loss of their edge effectiveness.
RESUMEN: El objetivo de este estudio fue describir la calidad de obturaciSn radiogr⁄fica que se o... more RESUMEN: El objetivo de este estudio fue describir la calidad de obturaciSn radiogr⁄fica que se obtiene al utilizar elsistema ProTaper Universal Manual de conicidad aumentada, respecto del sistema convencional que utiliza taper 0,02. Seutilizaron cincuenta y cuatro piezas dentarias humanas extra™das, las cuales se dividieron en dos grupos de 27 piezas cadauno. El grupo uno se instrumentS con el sistema convencional y el grupo dos que se redujo a 23 piezas, con el sistemaProTaper Universal Manual. Posteriormente fueron obturadas con la t”cnica de condensaciSn lateral y la t”cnica del conoœnico modificada respectivamente. Se evaluS el grado de adaptaciSn de la masa obturadora, presencia de vacuolas, exten-siSn de la obturaciSn radicular, fractura de instrumentos y tiempo de trabajo. El grado de adaptaciSn de la gutapercha en lostercios cervical y medio, fue superior cuando se utilizaron conos ProTaper y en apical similar a la condensaciSn lateral. Lapresencia de vacuolas fue mayor en ...
Aim (Background): The palatal roots of the upper molars are generally selected to receive intrara... more Aim (Background): The palatal roots of the upper molars are generally selected to receive intraradicular retention posts for prosthetic purposes. The aim of this study was to evaluate the degree of transport in maxillary palatine canals prepared for intraradicular post insertion by using three different systems. Material and methods : Ninety extracted first maxillary molars were instrumented manually and obturated using the lateral condensation technique. They were then divided into three groups after the removal of gutta-percha from up to 5 mm of the working length. The canal curves were determined for each of three systems: non-instrumented canals, after instrumentation and sealed, and after gutta-percha removal. Results: The highest degree of canal transport was identified in the instrumented and obturated teeth, prior to the preparation of the canals for post insertion. No significant differences were observed in the canal transport of the three studied systems. Conclusion: Part...
The aim of this ex vivo study was to compare the ability of the apical sealing bioceramic cements... more The aim of this ex vivo study was to compare the ability of the apical sealing bioceramic cements BioRootTM RCS (Septodont) and MTA-Fillapex (Angelus). One hundred and eighty-four vestibular canals were selected from ninety-two recently extracted maxillary molars. Canals were instrumented with the mechanized system ProTaper Next and obturated using the single cone technique. The sample was randomly divided into two groups (92): Group 1 was obturated with BioRoot TM RCS, and Group 2 with MTA-Fillapex. Samples were processed for the leakage test by dye penetration and later cut longitudinally. The data obtained were tabulated and analyzed using Stata 15.0. The degree of leakage from BioRoot TM RCS was 0.03 mm, and MTA-Fillapex was 0.31 mm p (0.00). BioRoot TM bioceramic presented an adequate apical sealing, while MTA-Fillapex showed an accentuated leakage.
Introduction: The aim of this study was to evaluate the wear of ProTaper Next rotary files, X1, X... more Introduction: The aim of this study was to evaluate the wear of ProTaper Next rotary files, X1, X2, and X3 after shaping 6, 10, and 14 maxillary molar vestibular canals. Materials and Methods: One hundred and sixty-two rotary files were divided into three groups according to the number of prepared canals, namely Group 1 (6 canals), Group 2 (10 canals), and Group 3 (14 canals). After canal preparation, files were embedded in resin molds, sectioned at 6 mm from the tip, and the wearied surface was microscopically evaluated. AutoCAD® software was used to measure the wear of edges in the different sections and multilevel mixed linear regression model to statistically analyze the data. Results: The files exhibited progressive wear as the number of uses increased. X2 and X3 files of Group 2 (10 canals) showed the highest wear, which decrease at 14 canals. Conclusions: X1, X2, and X3 files can shape until 10 canals without loss of their edge effectiveness.
Aim (Background): The palatal roots of the upper molars are generally selected to receive intrara... more Aim (Background): The palatal roots of the upper molars are generally selected to receive intraradicular retention posts for prosthetic purposes. The aim of this study was to evaluate the degree of transport in maxillary palatine canals prepared for intraradicular post insertion by using three different systems. Material and methods : Ninety extracted first maxillary molars were instrumented manually and obturated using the lateral condensation technique. They were then divided into three groups after the removal of gutta-percha from up to 5 mm of the working length. The canal curves were determined for each of three systems: non-instrumented canals, after instrumentation and sealed, and after gutta-percha removal. Results: The highest degree of canal transport was identified in the instrumented and obturated teeth, prior to the preparation of the canals for post insertion. No significant differences were observed in the canal transport of the three studied systems. Conclusion: Partial preparation resulted in weakening of the root structure and transport in the root canal.
Introduction: The aim of this study was to evaluate the wear of ProTaper Next rotary files, X1, X... more Introduction: The aim of this study was to evaluate the wear of ProTaper Next rotary files, X1, X2, and X3 after shaping 6, 10, and 14 maxillary molar vestibular canals. Materials and Methods: One hundred and sixty-two rotary files were divided into three groups according to the number of prepared canals, namely Group 1 (6 canals), Group 2 (10 canals), and Group 3 (14 canals). After canal preparation, files were embedded in resin molds, sectioned at 6 mm from the tip, and the wearied surface was microscopically evaluated. AutoCAD® software was used to measure the wear of edges in the different sections and multilevel mixed linear regression model to statistically analyze the data. Results: The files exhibited progressive wear as the number of uses increased. X2 and X3 files of Group 2 (10 canals) showed the highest wear, which decrease at 14 canals. Conclusions: X1, X2, and X3 files can shape until 10 canals without loss of their edge effectiveness.
RESUMEN: El objetivo de este estudio fue describir la calidad de obturaciSn radiogr⁄fica que se o... more RESUMEN: El objetivo de este estudio fue describir la calidad de obturaciSn radiogr⁄fica que se obtiene al utilizar elsistema ProTaper Universal Manual de conicidad aumentada, respecto del sistema convencional que utiliza taper 0,02. Seutilizaron cincuenta y cuatro piezas dentarias humanas extra™das, las cuales se dividieron en dos grupos de 27 piezas cadauno. El grupo uno se instrumentS con el sistema convencional y el grupo dos que se redujo a 23 piezas, con el sistemaProTaper Universal Manual. Posteriormente fueron obturadas con la t”cnica de condensaciSn lateral y la t”cnica del conoœnico modificada respectivamente. Se evaluS el grado de adaptaciSn de la masa obturadora, presencia de vacuolas, exten-siSn de la obturaciSn radicular, fractura de instrumentos y tiempo de trabajo. El grado de adaptaciSn de la gutapercha en lostercios cervical y medio, fue superior cuando se utilizaron conos ProTaper y en apical similar a la condensaciSn lateral. Lapresencia de vacuolas fue mayor en ...
Aim (Background): The palatal roots of the upper molars are generally selected to receive intrara... more Aim (Background): The palatal roots of the upper molars are generally selected to receive intraradicular retention posts for prosthetic purposes. The aim of this study was to evaluate the degree of transport in maxillary palatine canals prepared for intraradicular post insertion by using three different systems. Material and methods : Ninety extracted first maxillary molars were instrumented manually and obturated using the lateral condensation technique. They were then divided into three groups after the removal of gutta-percha from up to 5 mm of the working length. The canal curves were determined for each of three systems: non-instrumented canals, after instrumentation and sealed, and after gutta-percha removal. Results: The highest degree of canal transport was identified in the instrumented and obturated teeth, prior to the preparation of the canals for post insertion. No significant differences were observed in the canal transport of the three studied systems. Conclusion: Part...
The aim of this ex vivo study was to compare the ability of the apical sealing bioceramic cements... more The aim of this ex vivo study was to compare the ability of the apical sealing bioceramic cements BioRootTM RCS (Septodont) and MTA-Fillapex (Angelus). One hundred and eighty-four vestibular canals were selected from ninety-two recently extracted maxillary molars. Canals were instrumented with the mechanized system ProTaper Next and obturated using the single cone technique. The sample was randomly divided into two groups (92): Group 1 was obturated with BioRoot TM RCS, and Group 2 with MTA-Fillapex. Samples were processed for the leakage test by dye penetration and later cut longitudinally. The data obtained were tabulated and analyzed using Stata 15.0. The degree of leakage from BioRoot TM RCS was 0.03 mm, and MTA-Fillapex was 0.31 mm p (0.00). BioRoot TM bioceramic presented an adequate apical sealing, while MTA-Fillapex showed an accentuated leakage.
Introduction: The aim of this study was to evaluate the wear of ProTaper Next rotary files, X1, X... more Introduction: The aim of this study was to evaluate the wear of ProTaper Next rotary files, X1, X2, and X3 after shaping 6, 10, and 14 maxillary molar vestibular canals. Materials and Methods: One hundred and sixty-two rotary files were divided into three groups according to the number of prepared canals, namely Group 1 (6 canals), Group 2 (10 canals), and Group 3 (14 canals). After canal preparation, files were embedded in resin molds, sectioned at 6 mm from the tip, and the wearied surface was microscopically evaluated. AutoCAD® software was used to measure the wear of edges in the different sections and multilevel mixed linear regression model to statistically analyze the data. Results: The files exhibited progressive wear as the number of uses increased. X2 and X3 files of Group 2 (10 canals) showed the highest wear, which decrease at 14 canals. Conclusions: X1, X2, and X3 files can shape until 10 canals without loss of their edge effectiveness.
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